ABB Bailey NSPS02 Power Supply Unit

This power supply unit delivers regulated DC power for ABB Bailey INFI 90 system racks. The ABB Bailey NSPS02 converts AC mains into stable outputs for logic and I/O modules. A high-efficiency switching design minimizes heat generation inside control cabinets. Consequently, plant engineers can rely on this unit for continuous automation system operation.

Technical Specifications of the Power Supply Unit

The ABB Bailey NSPS02 measures 170 mm in width and 310 mm in height. Its depth reaches 150 mm for standard INFI 90 rack mounting. The unit weighs approximately 3.1 kg including all internal transformers and heat sinks. A single front panel LED array shows output status, overload, and fault conditions. The rear side uses a 24-pin backplane connector for power distribution. This design stores minimal energy in large filtering capacitors only. Therefore, the unit contains no batteries for energy storage.

Parameter	Specification
Brand	ABB Bailey
Full Model	NSPS02
Category	Power Supply Unit
Dimensions (W x H x D)	170 mm x 310 mm x 150 mm
Weight	Approximately 3.1 kg
Input Voltage	100-240V AC ±10% (auto-ranging)
Input Frequency	47-63 Hz
Output 1	+5V DC at 30 A
Output 2	+24V DC at 10 A
Output 3	-15V DC at 3 A
Total Output Power	250 W maximum
Backplane Connector	24-pin
Energy Storage	Minimal (filtering only)
Efficiency	87% typical
Protection Features	Overvoltage, overcurrent, overtemperature
Hold-up Time	20 ms at full load

Functional Features and Power Distribution

The ABB Bailey NSPS02 automatically selects the correct input voltage range without jumpers. You can operate two units in parallel for redundant power configurations. The unit provides soft-start circuitry to limit inrush current during power-up. A front panel test point allows voltage verification with a standard meter. Consequently, this power supply ensures stable operation for INFI 90 CPU and I/O modules.

Installation and System Integration

You must install this power supply unit into a dedicated INFI 90 rack slot. The ABB Bailey NSPS02 connects to the backplane automatically upon full insertion. The unit requires adequate clearance around its ventilation slots for cooling. A hinged terminal cover protects AC input connections from accidental contact. Always verify total load current before adding modules to the rack system.

Maintenance and Operational Benefits

Because the ABB Bailey NSPS02 uses no battery, it needs no periodic battery replacements. Technicians can replace the unit without losing any system configuration or user data. The fanless design eliminates noise and reduces mechanical wear over time. Consequently, this power supply offers reliable, maintenance-free service for years of continuous operation.